Machine for converting and spraying materials



1954 J. L. KELLY ET AL 2,586,695

MACHINE FOR CONVERTING AND SPRAYING MATERIALS Filed April 21, 1953INVENTORS. (Imam/1295' fizzy t? fiAyA qzqpflA came ATTORNEY PatentedAug. 17, 1954 MACHINE FOR CONVERTING AND SPRAYING MATERIALS Joseph LeeKelly, Union, and Frank J. Garragher, i Irvington, N. J.

Application April 21, 1953, Serial No. 350,159

This invention relates to a machine for spraying materials. It hasparticular reference to a machine for coating surfaces with materialssuch as solid matter normally of comparatively sluggish consistency. Themachine of this invention converts said matter to a relatively liquid,flowing state, and provides for controlled projection thereof by theoperator onto the surface to be covered.

Pursuant to the invention, a casing is provided having a compartmentfrom which the material to be sprayed passes through a flexible hose andspray gun. Pursuant to the invention, the material is heated by a secondcompartment and is kept heated right up to the point of discharge fromthe spray gun. The compartment into which the relatively solid matter isinitially deposited is provided with pressure means and may be providedwith a safety valve for the relief of pressure if it rises above apredetermined safe value. The second compartment, which serves thefunction of heating the first compartment, is filled with a heatingmedium such as oil, which is circulated through the flexible hose and upto the gun, from which point it is pumped back to the secondcompartment. An air line is preferably connected to the spray gun andkept at the heated temperature of the material in the first compartment;the air line, for that purpose, is passed through the second compartmentimmediately below the floor of the first compartment, thereby minimizingloss of heat in contact with the material passing through the spray gununder pressure.

These and other advantageous objects, which will appear from thedrawings and from the description hereinafter, are accomplished by thestructure of our invention, of which an embodiment is illustrated in thedrawings. It will be apparent, from a consideration of said drawings andthe following description, that the invention may be embodied in otherforms suggested thereby, and such other forms as come within the gishsolid matter to a relatively liquid, flowing state of controlledprojection, embodying the invcntion, and

Fig. 2 is an opposite side elevational view thereof, showing,fragmentarily, the spray gun and its connection with the casing.

4 Claims. (Cl. 299-86) As shown in the drawings, the machine of theinvention is generally designated by the reference character I!) andcomprises a casing H which is divided, as, for example, by the wall 12,into a first compartment 13 and a second compartment M. The firstcompartment I3 is provided with a cap [5 or the like for filling it withthe material to be sprayed. The latter may be a solid material ofcomparatively sluggish characteristics at normal temperature, which maybe converted into a relatively smooth flowing liquid or may be thinnedout and, therefore, made better adaptable for projection upon heating.The second compartment 14 is the heating compartment; it is locatedimmediately below and contiguous to the first compartment. In the formshown in Figs. 1 and 2, the first and second compartments are divided bythe Wall I2 which is disposed interiorly axially and intermediate theheight of the casing and coextensive therewith thermostat 43 may be cutinto the circuit to heating element II.

By the arrangement described, the contents of the first compartment I3may be heated to the desired temperature for projection through a spraygun 2|) having a control trigger 2| and nozzle 22 for projection of' thematerial onto the surface to be covered thereby.

By the means above described, the second compartment is a heatingcompartment for heating the first compartment 13 to thereby heat thematter therein and convert the same to a relatively liquid flowing statefor projection through spray gun 20. Flexible line 23 is connected atone end 24 to the second compartment [4 and at the other end 25 to spraygun 20. A flexible return section 26 is provided between the spray gun20 and the second compartment l4 and is connected to a pump 21 which inturn is connected by means such as shown as at 28, 28' to the secondcompartment. By this arrangement, the heated bath oil from the secondcompartment may be passed through flexible line 23 up to the point, viz:the spray, gun, at which the material from compartment I3 is to beprojected,

the point of passage. The device is provided with pressure means, suchas, for example, compressed air line 35, connected as at -36 with acompressor or other external source of coinpressed air. The compressed.airline passes through the wall l2 and intothe second :com-

partment, and is preferably passed transversely back and forth withinthe second 'compartment immediately beneath the first compartment, sothat the air passing from the point of entry35 through the machine, willbe heated to the point 37 at which said "air lineleaves the"casing forconnection with flexible compressed air-line "section '31 leading to thespray gun 20. Intermediate the sections 31,31 ofthe'airjlineya'gauge"-3'8 or the like maybe provided'to indicatetheflirect pressure togun 2Ic,"and a gau'ge' iil'may be'provided to indicate the pressureinthefirst compartment i3. Valve'39 may be cut into the line '3"! andits connection with "the' firstcompartment to regulate the pressureexerted 'onthe'material l in compartment it; said valve'may be by-passedin the connection between'the'line '3'! and line 3'! to the spray gun'ZGto 'give thelatter thebenefit of the full pressure of line'Sl. The'fi'rst cornpartment may be provided with a: safety 'valve 4''! toautomatically relieve any excess'pressure. By the arrangement described,it will be noted that, pursuant to the invention, a highly "efiectiveand efiicient means is provided for the conversion of the matter to beprojected from -a"so1id,' compartively sluggish stateyto 'a relativelyliquid flowing state and for the maintenanceof the temperature thereofto the point of discharge thereof from the spray gun.

It is to be particularly observed that the machine or apparatus abovedescribed is' self-contained and the casing H is provided with casters'42 whereby the apparatus is capable of being rolled into a relativelylong vat whose interior Wall is to be lined and then moved'fromtheremote end of the vat'to an opening therein -in-the course of a walllining operation hy'theimproved apparatus.

Having thus described our' invention, what we claim as new and. desireto "secure by Letters 55 Patent is:

1. Apparatus for converting -comparatively sluggish, solid matter'to a"substantially liquid flowing state and for the controlled projectionthereof onto a surface to be covered thereby, comprising an elongatedcasing, a horizontally disposed partition wall in said casing dividingthe same into upper and lower compartments, said casing being providedwith a filling opening for admission of the said matter into said "upperico'mpartment, saidncasing being further provided with a second fillingopening for the admission of fluid into said lower compartment, meanssupported by said casing and extending into said lower compartment forheating the fiuid therein, a spray gun for controlling the projectionofsaid.matter onto said surface, a fiexilbleconduit connecting said spraygun with said upper compartment, a second flexible conduit surroundingsaidfirst conduit and having one end thereof communicating with saidlower compartment and the opposite end thereof connected to said spray,gun for contact of heated .fiuid "from said flo'wer compartment withsaid first conduit forbea'ting the l'fiowingmatter therein, a thirdconduit communicating with said second conduit extending from said'sprayigun'to said lower compartment for return of the heating fluidtheretogafpump in said apparatus with whichsaid'third'conduit is'incommunication for forcedcirculation of said heating fluid, and an.air conduit extending through said lower com- ,partment and to saidspray gun for conducting compressed-air 'to saidgun Iforforced projec-"tionof the liquefied mattertherefrom.

'2. Apparatus according to claim .1, wherein "said .casing is providedwith casters, and wherein .said apparatus isoa self-contained unit formovement With'ina vat'rintheprogressive.coating of the inner wallwhereof .from.the .remote end -.ofithe vat '.to an entrance openingtherein.

3. Apparatus according .to .claim A1, wherein said aircondiiit isdisposedibeneath and adjacent said partition walland whereinlsameis.ofserpentine formation.

'4. Apparatus according "to .claim Ll, :together with an aircon'diiitiin communication with-said first air'co'nd-uitand whichis incommunication with said upper compartment, apres surengauge incommunication with said air conduits, and-a safetyvalvelinlcommunication with said .uppper compartment.

References Gited in-the file of 'this"patent UNITED PATENTS Number NameDate #1581736 rsch'enek June 8, 1926 2;3-78- ;184 ZCarlson June '12,1945 235061343 Seiler 'May '9, 1'950 2;5'46;74l 'Grossrnan 'Mar. 27,1951

